10. PROTECTOR OPERATION CHECKING
No.Adjustment pointAdjustment procedure/conditionsWaveform and others
1BEAM1) Receive "Monoscope Pattern" signal.* Select one of Q853/4/5 to do
PROTECTOR2) Set CONTRAST MAX.each short.
3) Set BRIGHT MAX.
4) During the Collector & Emitter of Q853/4/5 short,
make sure the protector ON and switch to standby
mode.
2H, V PROTECTOR 1) Receive "Monoscope Pattern" signal.
2) Connect output of Bias Box to D602 cathode
(C602 positive).
3) Set voltage of Bias Box to 18V and make sure
the protector is not working.
4) Set voltage of Bias Box to 27V , and make sure
the protector is working.
3OTHER1) Once finish rectified Electrolytic Capacitor short
PROTECTORtesting in +B line, check all possible damaged
components on +B line.
(Use random selected set for inspection)
11. A/V INPUT, OUTPUT & COMPONENT IN CHECKING
No.Adjustment pointAdjustment procedure/conditionsWaveform and others
1VIDEO AND1) Receive the "PAL Colour Bar" signal (100% White
AUDIOColour Bar, Sound 400 Hz 100% Mod.)
OUTPUT2) Terminate the Video output with a 75 ohm imped-
CHECKance. Make sure the output is as specified
(1.0 Vp-p?3dB).
3) Terminate the Audio output with a 10Kohm imped-
ance. Make sure the O/P is as specified
(1.5 Vp-p?3dB).
2VIDEO AND1)Using the TV/VIDEO key on the remote control-
AUDIO INPUTler, make sure that the modes change in order ofOnly for the model which have
CHECKTV, AV1, AV2 & TV again and the video & audioAV2 function.
output are according to the input terminal for each
mode.
1)Using the TV/AV key on the remote controller,
make sure that the modes change in order of TV,
AV, & TV again and the video & audio output areOnly for those model which
according to the input terminal for each mode. Ifhave AV1 only.
connect input to Front and Rear AV terminal, in-
put terminal of Front AV will be selected.
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ACEC
